Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14a6860ce2565e2…

MALICIOUS

PDF

73.0 KB Created: 2021-02-27 05:16:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 6063b689122f4db335aea159ae2aebff SHA-1: 929bd36ce3f1d205b540cfef5fff34f67b8a1653 SHA-256: b14a6860ce2565e239a9de43d62db46f2bace2fdcc810b3ec6dc190b93a0c279
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to redirector infrastructure or link farms, suggesting a phishing or SEO manipulation campaign. The presence of a link to a known malicious redirector at 'https://dafemum.ru/wix?keyword=modoc+county+board+of+supervisors' is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/wix?keyword=modoc+county+board+of+supervisors In PDF document text
    • https://cdn.sqhk.co/gegenosuzun/NAHHihb/kosasekizunifopi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407810/normal_5ff31ebad874d.pdfIn PDF document text
    • https://cdn.sqhk.co/raratajuxu/CgegcAY/dinghy_towing_guide_2011.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495855/normal_6006500058ff0.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/xhcqzpX/nunejujef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460072/normal_602d243df2c16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451018/normal_5fed91d61fa1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450415/normal_5fd0d73b73f8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5fd329ffc80a5.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/lajojiso-wuruporez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471941/normal_5fc7959b763f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zosajaxuv.epizy.com/puzzle_funny_questions_with_answers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE028 5424 bytes
SHA-256: 445579c8d42d69e3285f08eb04fa7291d83d7cb80aa003b8d51fcf226d8a87d2
font_01_sfnt_off0000f2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C1 10640 bytes
SHA-256: bd8267155ab27bcca1b9aa6ba30c80bec5d6b0c7be9cb333e9083c22084236fc

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